Results 1 to 10 of about 279,435 (317)

Open-Source Data Analysis Tool for Spectral Small-Angle X-ray Scattering Using Spectroscopic Photon-Counting Detector [PDF]

Sensors
Spectral small-angle X-ray scattering (sSAXS) is a powerful technique for material characterization from thicker samples by capturing elastic X-ray scattering data in angle- and energy-dispersive modes at small angles. This approach is enabled by the use
Sabri Amer, Andrew Xu, Aldo Badano, Eshan Dahal   +3 more
doaj   +2 more sources

Diffractive small angle X-ray scattering imaging for anisotropic structures

Nature Communications, 2019
Mesoscale investigations of material microarchitecture using small angle X-ray scattering (SAXS) methods have been limited by long measurement times. Here, the authors present an X-ray diffractive optics method which enables single shot acquisition of ...
Matias Kagias, Zhentian Wang, Mie Elholm Birkbak, Erik Lauridsen, Matteo Abis, Goran Lovric, Konstantins Jefimovs, Marco Stampanoni   +7 more
doaj   +2 more sources

A new dual-thickness semi-transparent beamstop for small-angle X-ray scattering [PDF]

Journal of Synchrotron Radiation
An innovative dual-thickness semi-transparent beamstop designed to enhance the performance of small-angle X-ray scattering (SAXS) experiments is introduced.
Haijuan Wu, Zhihong Li
doaj   +2 more sources

A review of synchrotron X-ray radiation spectroscopy and imaging ‎ ‎ [PDF]

Iranian Journal of Physics Research, 2021
Synchrotron radiation is an advanced polarized and collimated light source with high brilliance and intensity. whereas This radiation has a wavelength range of infrared to the highest-energy x-rays. In this article, we provide a summary of application of
Abolfazl Keshtkar vanashi, Hossein Ghasemzadeh mohammadi, Shiravan Afraz, Saeid Asghari zadeh, Mohammad Lamei rashti, Mona Haddad   +5 more
doaj   +1 more source

Direct observation of tRNA-chaperoned folding of a dynamic mRNA ensemble

Nature Communications, 2023
T-box riboswitches are multi-domain noncoding RNAs that surveil individual amino acid availabilities in most Gram-positive bacteria. T-boxes directly bind specific tRNAs, query their aminoacylation status to detect starvation, and feedback control the ...
Krishna C. Suddala, Janghyun Yoo, Lixin Fan, Xiaobing Zuo, Yun-Xing Wang, Hoi Sung Chung, Jinwei Zhang   +6 more
doaj   +1 more source

Small-Angle X-Ray and Neutron Scattering on Photosynthetic Membranes

Frontiers in Chemistry, 2021
Ultrastructural membrane arrangements in living cells and their dynamic remodeling in response to environmental changes remain an area of active research but are also subject to large uncertainty.
Dainius Jakubauskas, Kell Mortensen, Poul Erik Jensen, Jacob J. K. Kirkensgaard, Jacob J. K. Kirkensgaard   +4 more
doaj   +1 more source

COMP Report: CPQR technical quality control guidelines for use of positron emission tomography/computed tomography in radiation treatment planning

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Positron emission tomography with x‐ray computed tomography (PET/CT) is increasingly being utilized for radiation treatment planning (RTP). Accurate delivery of RT therefore depends on quality PET/CT data. This study covers quality control (QC) procedures required for PET/CT for diagnostic imaging and incremental QC required for RTP.
Ran Klein, Mike Oliver, Dan La Russa, John Agapito, Stewart Gaede, JeanPierre Bissonnette, Arman Rahmim, Carlos Uribe   +7 more
wiley   +1 more source

Treatment planning with a 2.5 MV photon beam for radiation therapy

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Purpose The shallow depth of maximum dose and higher dose fall‐off gradient of a 2.5 MV beam along the central axis that is available for imaging on linear accelerators is investigated for treatment of shallow tumors and sparing the organs at risk (OARs) beyond it.
Navid Khaledi, Chris Hayes, Louise Belshaw, Mark Grattan, Rao Khan, James L. Gräfe   +5 more
wiley   +1 more source

Validation of pencil beam scanning proton therapy with multi‐leaf collimator calculated by a commercial Monte Carlo dose engine

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract This study aimed to evaluate the clinical beam commissioning results and lateral penumbra characteristics of our new pencil beam scanning (PBS) proton therapy using a multi‐leaf collimator (MLC) calculated by use of a commercial Monte Carlo dose engine.
Yuki Tominaga, Yusuke Sakurai, Junya Miyata, Shuichi Harada, Takashi Akagi, Masataka Oita   +5 more
wiley   +1 more source

Accuracy of patient dose estimation in cone beam computed tomography in breast irradiation by size‐specific dose estimates with position correction

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract This study aims to investigate the effects of the position correction of size‐specific dose estimates (SSDE) on patient dose estimation in cone beam computed tomography (CBCT). The relationship between the phantom position and absorbed dose in the right breast was studied using optically stimulated luminescence dosimeters and a simulated human
Hiroyuki Ueno, Kosuke Matsubara, Sayuri Bou, Masato Hizume   +3 more
wiley   +1 more source